nixos-everywhere

nix/configuration.nix

@@ -0,0 +1,26 @@
+{ modulesPath, config, lib, pkgs, ... }: {
+  imports = [
+    (modulesPath + "/installer/scan/not-detected.nix")
+    (modulesPath + "/profiles/qemu-guest.nix")
+    ./disk-config.nix
+  ];
+  boot.loader.grub = {
+    # no need to set devices, disko will add all devices that have a EF02 partition to the list already
+    # devices = [ ];
+    efiSupport = true;
+    efiInstallAsRemovable = true;
+  };
+  services.openssh.enable = true;
+
+  environment.systemPackages = map lib.lowPrio [
+    pkgs.curl
+    pkgs.gitMinimal
+  ];
+
+  users.users.root.openssh.authorizedKeys.keys = [
+    # change this to your ssh key
+    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIG0n1ikUG9rYqobh7WpAyXrqZqxQoQ2zNJrFPj12gTpP"
+  ];
+
+  system.stateVersion = "23.11";
+}

nix/disk-config.nix

@@ -0,0 +1,56 @@
+# Example to create a bios compatible gpt partition
+{ lib, ... }:
+{
+  disko.devices = {
+    disk.disk1 = {
+      device = lib.mkDefault "/dev/sda";
+      type = "disk";
+      content = {
+        type = "gpt";
+        partitions = {
+          boot = {
+            name = "boot";
+            size = "1M";
+            type = "EF02";
+          };
+          esp = {
+            name = "ESP";
+            size = "500M";
+            type = "EF00";
+            content = {
+              type = "filesystem";
+              format = "vfat";
+              mountpoint = "/boot";
+            };
+          };
+          root = {
+            name = "root";
+            size = "100%";
+            content = {
+              type = "lvm_pv";
+              vg = "pool";
+            };
+          };
+        };
+      };
+    };
+    lvm_vg = {
+      pool = {
+        type = "lvm_vg";
+        lvs = {
+          root = {
+            size = "100%FREE";
+            content = {
+              type = "filesystem";
+              format = "ext4";
+              mountpoint = "/";
+              mountOptions = [
+                "defaults"
+              ];
+            };
+          };
+        };
+      };
+    };
+  };
+}

nix/flake.nix

@@ -0,0 +1,32 @@
+{
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+  inputs.disko.url = "github:nix-community/disko";
+  inputs.disko.inputs.nixpkgs.follows = "nixpkgs";
+
+  outputs = { nixpkgs, disko, ... }:
+    {
+      nixosConfigurations.hetzner-cloud = nixpkgs.lib.nixosSystem {
+        system = "x86_64-linux";
+        modules = [
+          disko.nixosModules.disko
+          ./configuration.nix
+        ];
+      };
+      # tested with 2GB/2CPU droplet, 1GB droplets do not have enough RAM for kexec
+      nixosConfigurations.digitalocean = nixpkgs.lib.nixosSystem {
+        system = "x86_64-linux";
+        modules = [
+          disko.nixosModules.disko
+          { disko.devices.disk.disk1.device = "/dev/vda"; }
+          ./configuration.nix
+        ];
+      };
+      nixosConfigurations.hetzner-cloud-aarch64 = nixpkgs.lib.nixosSystem {
+        system = "aarch64-linux";
+        modules = [
+          disko.nixosModules.disko
+          ./configuration.nix
+        ];
+      };
+    };
+}